﻿using System.IO;
using iTextSharp.text;
using iTextSharp.text.pdf;

namespace DotNet.Utilities
{
	/// <summary>
	/// PDF文档操作类
	/// </summary>
	//------------------------------------调用--------------------------------------------
	//PDFOperation pdf = new PDFOperation();
	//pdf.Open(new FileStream(path, FileMode.Create));
	//pdf.SetBaseFont(@"C:\Windows\Fonts\SIMHEI.TTF");
	//pdf.AddParagraph("测试文档（生成时间：" + DateTime.Now + "）", 15, 1, 20, 0, 0);
	//pdf.Close();
	//-------------------------------------------------------------------------------------
	public class PDFOperation
	{
		#region 构造函数
		/// <summary>
		/// 构造函数
		/// </summary>
		public PDFOperation()
		{
			rect = PageSize.A4;
			document = new Document(rect);
		}

		/// <summary>
		/// 构造函数
		/// </summary>
		/// <param name="type">页面大小(如"A4")</param>
		public PDFOperation(string type)
		{
			SetPageSize(type);
			document = new Document(rect);
		}

		/// <summary>
		/// 构造函数
		/// </summary>
		/// <param name="type">页面大小(如"A4")</param>
		/// <param name="marginLeft">内容距左边框距离</param>
		/// <param name="marginRight">内容距右边框距离</param>
		/// <param name="marginTop">内容距上边框距离</param>
		/// <param name="marginBottom">内容距下边框距离</param>
		public PDFOperation(string type, float marginLeft, float marginRight, float marginTop, float marginBottom)
		{
			SetPageSize(type);
			document = new Document(rect, marginLeft, marginRight, marginTop, marginBottom);
		}
		#endregion

		#region 私有字段
		private Font font;
		private Rectangle rect;   //文档大小
		private Document document;//文档对象
		private BaseFont basefont;//字体
		#endregion

		#region 设置字体
		/// <summary>
		/// 设置字体
		/// </summary>
		public void SetBaseFont(string path)
		{
			basefont = BaseFont.CreateFont(path, BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);
		}

		/// <summary>
		/// 设置字体
		/// </summary>
		/// <param name="size">字体大小</param>
		public void SetFont(float size)
		{
			font = new Font(basefont, size);
		}
		#endregion

		#region 设置页面大小
		/// <summary>
		/// 设置页面大小
		/// </summary>
		/// <param name="type">页面大小(如"A4")</param>
		public void SetPageSize(string type)
		{
			switch (type.Trim())
			{
				case "A4":
					rect = PageSize.A4;
					break;
				case "A8":
					rect = PageSize.A8;
					break;
			}
		}
		#endregion

		#region 实例化文档
		/// <summary>
		/// 实例化文档
		/// </summary>
		/// <param name="os">文档相关信息（如路径，打开方式等）</param>
		public void GetInstance(Stream os)
		{
			PdfWriter.GetInstance(document, os);
		}
		#endregion

		#region 打开文档对象
		/// <summary>
		/// 打开文档对象
		/// </summary>
		/// <param name="os">文档相关信息（如路径，打开方式等）</param>
		public void Open(Stream os)
		{
			GetInstance(os);
			document.Open();
		}
		#endregion

		#region 关闭打开的文档
		/// <summary>
		/// 关闭打开的文档
		/// </summary>
		public void Close()
		{
			document.Close();
		}
		#endregion

		#region 添加段落
		/// <summary>
		/// 添加段落
		/// </summary>
		/// <param name="content">内容</param>
		/// <param name="fontsize">字体大小</param>
		public void AddParagraph(string content, float fontsize)
		{
			SetFont(fontsize);
			Paragraph pra = new Paragraph(content, font);
			document.Add(pra);
		}

		/// <summary>
		/// 添加段落
		/// </summary>
		/// <param name="content">内容</param>
		/// <param name="fontsize">字体大小</param>
		/// <param name="Alignment">对齐方式（1为居中，0为居左，2为居右）</param>
		/// <param name="SpacingAfter">段后空行数（0为默认值）</param>
		/// <param name="SpacingBefore">段前空行数（0为默认值）</param>
		/// <param name="MultipliedLeading">行间距（0为默认值）</param>
		public void AddParagraph(string content, float fontsize, int Alignment, float SpacingAfter, float SpacingBefore, float MultipliedLeading)
		{
			SetFont(fontsize);
			Paragraph pra = new Paragraph(content, font);
			pra.Alignment = Alignment;
			if (SpacingAfter != 0)
			{
				pra.SpacingAfter = SpacingAfter;
			}
			if (SpacingBefore != 0)
			{
				pra.SpacingBefore = SpacingBefore;
			}
			if (MultipliedLeading != 0)
			{
				pra.MultipliedLeading = MultipliedLeading;
			}
			document.Add(pra);
		}
		#endregion

		#region 添加图片
		/// <summary>
		/// 添加图片
		/// </summary>
		/// <param name="path">图片路径</param>
		/// <param name="Alignment">对齐方式（1为居中，0为居左，2为居右）</param>
		/// <param name="newWidth">图片宽（0为默认值，如果宽度大于页宽将按比率缩放）</param>
		/// <param name="newHeight">图片高</param>
		public void AddImage(string path, int Alignment, float newWidth, float newHeight)
		{
			Image img = Image.GetInstance(path);
			img.Alignment = Alignment;
			if (newWidth != 0)
			{
				img.ScaleAbsolute(newWidth, newHeight);
			}
			else
			{
				if (img.Width > PageSize.A4.Width)
				{
					img.ScaleAbsolute(rect.Width, img.Width * img.Height / rect.Height);
				}
			}
			document.Add(img);
		}
		#endregion

		#region 添加链接、点
		/// <summary>
		/// 添加链接
		/// </summary>
		/// <param name="Content">链接文字</param>
		/// <param name="FontSize">字体大小</param>
		/// <param name="Reference">链接地址</param>
		public void AddAnchorReference(string Content, float FontSize, string Reference)
		{
			SetFont(FontSize);
			Anchor auc = new Anchor(Content, font);
			auc.Reference = Reference;
			document.Add(auc);
		}

		/// <summary>
		/// 添加链接点
		/// </summary>
		/// <param name="Content">链接文字</param>
		/// <param name="FontSize">字体大小</param>
		/// <param name="Name">链接点名</param>
		public void AddAnchorName(string Content, float FontSize, string Name)
		{
			SetFont(FontSize);
			Anchor auc = new Anchor(Content, font);
			auc.Name = Name;
			document.Add(auc);
		}
		#endregion
	}

	public enum PageType : int
	{
		A4 = 1,
		A8 = 2
	}
}